JPS6488341A - Infrared spectrochemical analysis apparatus - Google Patents

Abstract

PURPOSE:To easily obtain the IR absorption spectrum of a single component even with a sample in which different materials unidentifiable by an ordinary visible light image co-exist by providing polarizing means movable freely to the inside and outside of an optical path between an optical path and the sample to said optical path. CONSTITUTION:A polarizer 2 and an eyepiece 5 are moved to the outside of the optical path and an IR light source 13 is lighted up. The IR light emitted from the light source 13 is split by an interferometer 11 to interference light. The interference light is projected by a concave mirror 19 to a mirror 17 rotated in a desired direction and after the light reflects on the mirror 17, the light traces the same course as the course of visible light and transmits the sample 3; thereafter, the light passes a stop 10 which is so adjusted as to allow the passage of only the light transmitted through a part to be analyzed. The interference light past the stop 10 arrives at a high- sensitivity detector 12 after condensing 14 and is detected 12. The detected light is converted to an electric signal which is sent to a computing means 15 by which the processing such as Fourier transform is executed in accordance with the interference conditions of the interferometer 11 and the spectral intensity is calculated. The IR absorption spectrum obtd. in such a manner exactly reflects the IR absorption characteristic of the part to be analyzed.